215305230 has 64 divisors (see below), whose sum is σ = 609619968. Its totient is φ = 47623680.

The previous prime is 215305229. The next prime is 215305241. The reversal of 215305230 is 32503512.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 215305197 and 215305206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10027 + ... + 23046.

It is an arithmetic number, because the mean of its divisors is an integer number (9525312).

Almost surely, 2^215305230 is an apocalyptic number.

215305230 is an abundant number, since it is smaller than the sum of its proper divisors (394314738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215305230 is a wasteful number, since it uses less digits than its factorization.

215305230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33121.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 215305230 is about 14673.2828637630. The cubic root of 215305230 is about 599.3560034725.

Adding to 215305230 its reverse (32503512), we get a palindrome (247808742).

The spelling of 215305230 in words is "two hundred fifteen million, three hundred five thousand, two hundred thirty".